Predicting the evolution of dislocation density following hot deformation

Huang, Mingxin and Perlade, Astrid and Rivera-Diaz-Del-Castillo, Pedro E J (2011) Predicting the evolution of dislocation density following hot deformation. Philosophical Magazine Letters, 91 (6). pp. 387-393. ISSN 0950-0839

Abstract

A model to predict the evolution of dislocation density following hot deformation is presented in this article. The model is validated by stress relaxation experiments on austenite at various temperatures. It is found that the activation energy for self-diffusion is the rate-controlling parameter determining the evolution of dislocation density, and hence the recovery rate. A methodology to control the softening experienced by high-temperature alloys is proposed.